<?php if ( have_posts() ) : ?>
<h1><?php printf( __( 'Search Results for: %s', 'twentyten' ), '' . get_search_query() . '' ); ?></h1>
<?php
/* Run the loop for the search to output the results.
* If you want to overload this in a child theme then include a file
* called loop-search.php and that will be used instead.
*/
get_template_part( 'loop', 'search' );
?>

(I haven't actually edited the default search.php page yet, as I just want to get the indexing correct first)